Steinberg has announced the availability of the 7.5.10 maintenance updates for Cubase 7.5 and Cubase Artist 7.5. Both updates are a free download and fully supported (please see the bottom of this post for links).

The updates resolve the following issues*:

Global:

The loading time of huge projects is no longer unexpectedly high.

Switching between projects with different sample rates now works as expected.

Closing the record mode pop-up of the Transport Panel now behaves as expected.

Audio:

Emptying the trash on the Audio Pool no longer leads to an unresponsive state of the application.